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// Copyright (C) 2022 The Qt Company Ltd.
// SPDX-License-Identifier: LicenseRef-Qt-Commercial OR LGPL-3.0-only OR GPL-2.0-only OR GPL-3.0-only
#ifndef QGTK3INTERFACE_H
#define QGTK3INTERFACE_H
//
// W A R N I N G
// -------------
//
// This file is not part of the Qt API. It exists purely as an
// implementation detail. This header file may change from version to
// version without notice, or even be removed.
//
// We mean it.
//
#include <QtCore/QString>
#include <QtCore/QLibrary>
#include <QtCore/QCache>
#include <private/qflatmap_p.h>
#include <QtCore/QObject>
#include <QtGui/QPalette>
#include <QtWidgets/QWidget>
#include <QtCore/QLoggingCategory>
#include <QtGui/QPixmap>
#include <qpa/qplatformtheme.h>
#undef signals // Collides with GTK symbols
#include <gtk/gtk.h>
#include <gdk/gdk.h>
#include <glib.h>
QT_BEGIN_NAMESPACE
Q_DECLARE_LOGGING_CATEGORY(lcQGtk3Interface);
using namespace Qt::StringLiterals;
class QGtk3Storage;
class QGtk3Interface
{
Q_GADGET
public:
QGtk3Interface(QGtk3Storage *);
~QGtk3Interface();
// Enum representing GTK widget types
enum class QGtkWidget {
gtk_menu_bar,
gtk_menu,
gtk_button,
gtk_button_box,
gtk_check_button,
gtk_radio_button,
gtk_frame,
gtk_statusbar,
gtk_entry,
gtk_popup,
gtk_notebook,
gtk_toolbar,
gtk_tree_view,
gtk_combo_box,
gtk_combo_box_text,
gtk_progress_bar,
gtk_fixed,
gtk_separator_menu_item,
gtk_Default,
gtk_offscreen_window
};
Q_ENUM(QGtkWidget)
// Enum representing color sources of a GTK theme
enum class QGtkColorSource {
Foreground,
Background,
Text,
Base,
Border
};
Q_ENUM(QGtkColorSource)
// Enum for default color getter
enum class QGtkColorDefault {
Foreground,
Background,
Border
};
Q_ENUM(QGtkColorDefault)
// Create a brush from GTK widget type, color source and color state
QBrush brush(QGtkWidget wtype, QGtkColorSource source, GtkStateFlags state) const;
// Font & icon getters
QImage standardPixmap(QPlatformTheme::StandardPixmap standardPixmap) const;
QFont font(QPlatformTheme::Font type) const;
QIcon fileIcon(const QFileInfo &fileInfo) const;
// Return current GTK theme name
const QString themeName() const;
// Derive appearance from default colors
Qt::Appearance appearanceByColors() const;
// Convert GTK state to/from string
static int toGtkState(const QString &state);
static const QLatin1String fromGtkState(GtkStateFlags state);
private:
// Map colors to GTK property names and default to generic color getters
struct ColorKey {
QGtkColorSource colorSource = QGtkColorSource::Background;
GtkStateFlags state = GTK_STATE_FLAG_NORMAL;
// struct becomes key of a map, so operator< is needed
bool operator<(const ColorKey& other) const {
return std::tie(colorSource, state) <
std::tie(other.colorSource, other.state);
}
QDebug operator<<(QDebug dbg)
{
return dbg << "QGtk3Interface::ColorKey(colorSource=" << colorSource << ", GTK state=" << fromGtkState(state) << ")";
}
};
struct ColorValue {
QString propertyName = QString();
QGtkColorDefault genericSource = QGtkColorDefault::Background;
QDebug operator<<(QDebug dbg)
{
return dbg << "QGtk3Interface::ColorValue(propertyName=" << propertyName << ", genericSource=" << genericSource << ")";
}
};
typedef QFlatMap<ColorKey, ColorValue> ColorMap;
ColorMap gtkColorMap;
void initColorMap();
GdkRGBA genericColor(GtkStyleContext *con, GtkStateFlags state, QGtkColorDefault def) const;
// Cache for GTK widgets
mutable QFlatMap<QGtkWidget, GtkWidget *> cache;
// Converters for GTK icon and GDK pixbuf
QImage qt_gtk_get_icon(const char *iconName) const;
QImage qt_convert_gdk_pixbuf(GdkPixbuf *buf) const;
// Create new GTK widget object
GtkWidget *qt_new_gtkWidget(QGtkWidget type) const;
// Deliver GTK Widget from cache or create new
GtkWidget *widget(QGtkWidget type) const;
// Get a GTK widget's style context. Default settings style context if nullptr
GtkStyleContext *context(GtkWidget *widget = nullptr) const;
// Convert GTK color into QColor
static inline QColor fromGdkColor (const GdkRGBA &c)
{ return QColor::fromRgbF(c.red, c.green, c.blue, c.alpha); }
// get a QColor of a GTK widget (default settings style if nullptr)
QColor color (GtkWidget *widget, QGtkColorSource source, GtkStateFlags state) const;
// Mappings for GTK fonts
inline static constexpr QGtkWidget toWidgetType(QPlatformTheme::Font);
inline static constexpr QFont::Style toFontStyle(PangoStyle style);
inline static constexpr int toFontWeight(PangoWeight weight);
};
QT_END_NAMESPACE
#endif // QGTK3INTERFACE_H
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